DEVELOPMENT OF SUPERIOR RESID DEMETALLIZATION CATALYST AND ITS APPLICATION

The effects of the pore structure of the bimodal catalyst on the residue hydrodemetallization were studied. The simulation of the intra particle reaction model suggested that an increase in the diffusivity of the macro pore increase the demetallization. The activity tests of several catalyst samples with different pore structure supported the predicted results. The new bimodal dematallization catalyst with high demetallization activity as well as large metal uptake capacity was developed, by improving the pore structure and the hydrogenation activity. The pilot runs demonstrated that the new catalyst possesses longer catalytic life as well as higher demetallization activity in the residue desulfurization process.